diff --git a/Dockerfile b/Dockerfile
index 43cd0f4..f9589e5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,7 @@ FROM golang:1-alpine as builder
 WORKDIR /app
 
 COPY ./share/we-lang/we-lang.go /app
+COPY ./share/we-lang/go.mod /app
 
 RUN apk add --no-cache git
 
diff --git a/share/we-lang/go.mod b/share/we-lang/go.mod
new file mode 100644
index 0000000..8804943
--- /dev/null
+++ b/share/we-lang/go.mod
@@ -0,0 +1,3 @@
+module github.com/chubin/wttr.in/v2
+
+go 1.15